/* basic-css */
html, body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    border: 0;
    overflow: hidden;
    font-family: -apple-system, BlinkMacSystemFont, Segoe UI, PingFang SC, Hiragino Sans GB, Microsoft YaHei, Helvetica Neue, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol;
}

/* wrapper-class */
.view-wrapper {
    margin: 0;
    width: 100%;
    height: 100%;
    border-radius: 2px;
    background-color: #F5F7F7;
    overflow: auto;
}

/* 垂直水平居中 */
.hv-center {
    position: absolute;
    top: 50%;
    left: 50%;
    margin: auto;
    -webkit-transform: translate(-50%, -50%);
    -ms-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
}

/* 垂直水平居中 */
.hvf-center {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 垂直居中 */
.vf-center {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}
